Marie Newman beats incumbent Rep. Dan Lipinski in Illinois primary

Marie Newman, a progressive challenger to incumbent Rep. Dan Lipinski, won the Democratic primary in Illinois' 3rd Congressional District Tuesday night, AP reports.

Why it matters: Lipinski, one of the most conservative Democrats in the House, is the first incumbent Democratic Congress member to lose their seat this year. He was one of two Democrats to sign an amicus brief in January asking the Supreme Court to revisit and potentially overturn Roe v. Wade, which protects the right for women to seek abortions. Newman, who is an abortion-rights advocate, ran on a platform that highlighted their differences.